NH4OH is a ………..
a) weak acid
b) weak base
c) strong acid
d) strong base
…………….. is a strong base.
a) CH3COOH
b) NaOH
c) NH4OH
d) HCl
……….. is one of the most commonly used disinfectant for water disinfection.
a) Cl
b) O
c) H
d) C
………..can be applied for killing most microorganisms.
a) Cl
b) H
c) O
d) C
Chlorine has a number of applications such as the …………
a) killing of pathogens in drinking water
b) for the disinfection of household areas
c) for textile bleaching
d) all of these
